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Home/Math Calculators/Triangle Calculator

Triangle Calculator

Solve triangles using sides and angles

Solve Mode

Provide all three sides

Side a

Side b

Side c

Math

View All Math Calculators →

Written by the EachTools Team

Last updated: January 2026

How Triangle Calculations Work

Triangle calculators solve for unknown sides and angles using the Law of Sines, Law of Cosines, and basic trigonometric relationships.

Steps

Enter known values (sides, angles, or a combination).
The calculator automatically determines solvable values.
View all sides, angles, area, and perimeter.